Source code
Revision control
Copy as Markdown
Other Tools
// GENERATED, DO NOT EDIT
// file: compareIterator.js
// Copyright (C) 2018 Peter Wong. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
description: Compare the values of an iterator with an array of expected values
defines: [assert.compareIterator]
---*/
// Example:
//
// function* numbers() {
// yield 1;
// yield 2;
// yield 3;
// }
//
// assert.compareIterator(numbers(), [
// v => assert.sameValue(v, 1),
// v => assert.sameValue(v, 2),
// v => assert.sameValue(v, 3),
// ]);
//
assert.compareIterator = function(iter, validators, message) {
message = message || '';
var i, result;
for (i = 0; i < validators.length; i++) {
result = iter.next();
assert(!result.done, 'Expected ' + i + ' values(s). Instead iterator only produced ' + (i - 1) + ' value(s). ' + message);
validators[i](result.value);
}
result = iter.next();
assert(result.done, 'Expected only ' + i + ' values(s). Instead iterator produced more. ' + message);
assert.sameValue(result.value, undefined, 'Expected value of `undefined` when iterator completes. ' + message);
}